Some immersions of Lorentz surfaces into a pseudo-Riemannian space of constant curvature and of signature (2,2). (English) Zbl 0333.53017
MSC:
53B25 | Local submanifolds |
53B30 | Local differential geometry of Lorentz metrics, indefinite metrics |
53B25 | Local submanifolds |
53B30 | Local differential geometry of Lorentz metrics, indefinite metrics |